Sample 92-021

NavDat sample number 57484 · ANDESITE

Sample

Sample ID	92-021
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.3678
Longitude	-121.64
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
28		24	33

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	60.33		WT%	XRF
TIO2	0.9		WT%	XRF
AL2O3	18.27		WT%	XRF
FEO	5.76		WT%	XRF
MNO	0.09		WT%	XRF
MGO	2.82		WT%	XRF
CAO	5.25		WT%	XRF
NA2O	5.13		WT%	XRF
K2O	1.19		WT%	XRF
P2O5	0.26		WT%	XRF

References

Swanson, Donald A (1994) Geologic map of the East Canyon Ridge Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1994.